Envelope-making machine



Filed Feb, 5, 1931 5 Sheets-Sheet l N. @www n es 02 E. TN 0 A W .nvm .A WFL/Y f5 Nov. 8, 1932. c. F. PFLANZE 1,886,728

ENVELOPE MAKING MACHINE Filed Feb. 5, 1931 5 Sheets-Sheet 2 A Trae/v5 v NOV- 8, 1932. c. F. PFLANzE .1,386,728

ENVELOPE MAKING MACHINE FiledFebys. 1931 5 sheets-sheet 3 lf O5 01 o kn w b 1 u 0 a@ To loi -iTI f O, O

EY im? /4 TTG/EN Nov. 8, 1932. C, PFLANZE 1,886,728

ENVELOPE MAKING MACHINE Filed Feb. 5; 1951 5 4sheets-sheet 4 /NVE/ym'e 6. PFL A N25 A fr0/EWE Y Nov. 8, 1932.

C. F. PFLANZE ENvELoPE MAKING MACHINE Filed Feb.V 5, 1931 5 Sheets-Sheet 5 ATTORNEY .Patented Nov. 8, 1932 4ennemis r. rrn'nnzn, or 'Wassern Gnovns, iviissonni ENvnLePn-MAKING- MACHINE Application led Eebruary 5, 'Serial'Nm 513,502.

This invention relates generally to envelope-making machines, and more speciiically to an improved machine ot this type which includes an adjustable head which supports the 5 blank-feeding mechanism of the machine, the

predominant object oi' the invention'bei-ng t0 provide an envelope-making machine which is capable of being adyusted so that envelopes of diiferent depths, within certain limits, may

1@ be fed intofthe machine by the Jieeding mechanism thereof with equal facility and accuracy. The 'improved machine disclosed herein includes also means whereby certain elements of the guinming mechanism may be adjusted 35 transversely oi the machine to permit of the gumming of envelope blanks of Vdiiferent widths.

Prior to this invention, envelope-making machines 0I" the general type to which the machine disclosed herein belongs were provided with feeding mechanisms which remained in xed locations with respect to the remainder oithe machines. These feeding mechanisms were adapted to feed envelope blanks of various depths into the machines, and because there was a substantial difference in depth between the largest and the smallest blanks handled by the machines, it was necessary to provide transfer mechanisms which transferred the shorter blanks from the feeding mechanisms to the fixed points at which the envelope blanks entered the blank-folding mechanisms of the machines. One Vtype of transfer mechanism was provided by extending a traveling belt, which constituted a part of the feeding mechanism of the machine, forwardly toward the fixed point at which the blanks entered the folding mechanism of the machine, and while such a transfer mechanism :functioned with a fair degree of success, the likelihood was always present that the positions of the envelope blanks wouldA be disturbed while being transferred, with the result that said eiivelope blanks would be improperly presented to the folding mechanisms of machines.

rEhe feeding mechanism of my improved machine is supported by a head which is adjustable toward and from the'ioldingr mechanism, hence the discharge endV of vsaid feedinfT mechanism nia flbe brou' ht` to. affoint c y Ywhich is so related to thefolding mechanism of the machine that eac-h .envelope blanlnre- .gardless kii its depth, is fed v'directly fromthe vfeeding mechanism to the iixedpoint at Which-,515 the folding operation is commenced. ...This arrangement entirelyeliminates the intermediate transfer mechanism f which 'heretofore was necessary for the .purpose ofV movin-g shorter blanks fr'om the Jfeeding mechanism .-.yco to the folding mechanismoffthe machine.

In addition tothe foregoing, myfimproved machine includes ineans whereby elements of the gumming imechanism, when 'the latterk mechanism is carried by the adjustable head c5 ,which supports the feeding. mechanism, may be adjusted-transversely of the' machine to accommodate envelope yblanks of dierent widths.

Fig. 1 is a fragmentarysectionof an' enve-go lope-making machine constructed in accordance with this'invention. y Y Fig. Qis an enlargedsectional 'view of .substantially al1 of the mechanism illustrated .in Fiel, Ai Fig. 3 is a fragmentary'detailshowing'the 'manner of driving of the feeding. mechanism, y Fig, l illnstrates'the mechanism'shown '1n Fig. 3, partly in horizontal section and partly in Plan' y v f :i

Fi-g.v 5 isa view of the machine,partly in horizontal sectionand partly in plan. y i

Gis a section on lineof'FigQ; Fig.r 7 is a section on line JOFig. 2.1' In the drawings,wherein is shown orthe 85 vpurpose 'of illustration, merely, one embodiment ofthe invention, A designates my improved'machine generally,'s aid machine including opposed side frame members B, Which support the various elements and. mechanisms .i90 of which the machine is comprised. uAdjnstu ablysupported by the sidetramemembers B is a head@ (Figs. l and 2) "which likewise comprises apair of'opposed side fraine'members l. The-loweredges; ofthe sidefframe 495 members of the head C are provided withinverted V-shap'ed grooves2vvhichextendfrom end to end of the lower edges O "saidside frame members, and tch-ese vgrooves receive cerrespondingly shaped projections 3 .formed i 30, Y with the side frame members y1 ofthe adjuston the portions B of the side frame members B, -saidprojections being arranged substantiallyY horizontally and providing elongated Ysupporting traclrways forr the adjustable head C.

tdesignates'an adjusting screw which is supported atl'one of Aits ends byfa member "5 which is fixedY to or vformed integral with the side frame members B of the machine, and at n its opposite end byv anendframe member 6 of the machine. The adjusting screw at its opposite ends is Vprovided withgreduced por-f tions L1 which are provided with smooth surfaces, as shown in Fig.r- 1, these: portions being disposed in apertures formed in the member 5 and Vend frame l.member VV6, respecft1vely,' so that the adjust-ing screw may be sub- 'jectedto axial rotation. vAlso,theadjusting i screw is provided` with .shoulders 4a at the points where tliereduced portions join the main screw-threaded portion of thewadjustin'g'screw, said should-ers being in substantial contact. with theinner faces of the member 5 and end frame member 6, so asto prevent longitudinal movement'ofv the' adjusting Y screw. Thescrew-threa'ded portion of the adjusting screw 4f s' is extended through a screw-threaded aperture 7 formed through anV extension '8V fixed to ror formed integral able headl C; vialso, the adjusting'screw is vprovided at its outer end with a hand wheel 9 which is fixed thereto and serves to facilitate the rotation vofthe adjusting screw.

Itis obvious,v in viewof the arrangement vjust described, that if the adjusting screw 11- be subjected to axialv rotation the extension 8 `V'will move longitudinally of-v the screwthreaded l'portion of the adjusting `screwin .One or the other direction,',dependingenr-the` direction ofkrr'otation loffsaidfadjusting screw.

f V`fItivigfliliewiseplain. thatfthe extension 8 is fixed to y.or lformed integral 4with `the Vside Y frame'members 1 of the head C, hencc'said' hea-d lwillbe 'subjected'to like movement.

'I `VExtended transversely of the head Gand supported inVV bearings provided bythe opposite side frameV members 1` thereof is a shaftl lOwhichvhasliixed thereto a pulley or y'cylinder 11. The side frame members V1 of the head'Calso supporta similar transversely extended shaft'12 ywhich is iocated above and to one sideof the shaft 10, and a like transversely `extended shaft 13V which` is located belowand to the opposite side of said shaft 10.

i `lsupports a Vpairof spaced apart lwarms 1'?,

Th'ezarm's 17 are vsecured* to rtheshaft 16 byl setscrews"18,' and the ends of saidV arms opposite to the ends thereof which are secured which a pulley 2O is rotatably supported. The pulleys 11, 11i, 15,v and 20 arearranged iii the same vertical plane, and supported by said pulleys is'an endless belt 21. The end-' less belt 21 passes around the upper portion of the pulley 14- andmovesbetweenVY said'pulley Y 14 and the .pulley 11, said belt' then passing around'substantially one-half ofthe pulley 11 andmoving around tliepulley 15. the pulleylthe endless belt extends to the pulley 20, a-roundwhich it passes, and then extends to the pulley le. The portion of the belt which passes around the pulley 11, of

.to the shaftA 16 support a short shaft 19 on 1 T1 17s il T0111 i course, coiita'ctswithl the peripheral face of saidpulley asfshown clearly in Fig'. 1;Y The pose of tightening the belt 21,-fsuch adjust- 'ment being-accomplished vby unscrewing the set screws 18 and swinging the pulley-supr-` porting ends Vof the arms'in an are of aci'rcle about the shaft 16.' i

The side frame members lof the head "YC if Tofvmy improved machine are provided :with

portions 1 which extend upwardly and forwardly at an angle with respect to the remaining portions of said side frame` mem- 1 bers, and supported at the upperv ends .of

lthese angular frame portionsis a feed'table from which theenvelope blanksV arefed l tothe machine. The feed table F comprises va plate 22'which is provided with aout-out i portion 23 and is preferably arranged atY a slight anglel to the true horizontal.,V lAsso- "ciated with thev plate 22 is aplurality of adpulley .20 aboutV which the :endless belt 21l Vpasses is kcapable vof adjustment for the purjustable guiding members'24Y whichserve 'to support a stach of envelope blanks and guide their movement as theyare fed into themachine one by'one. The guiding members 24 are adjustable so'- as to provide for the sup-- port and guidance'of blanks ofdifferent di-.

mensions and shapes, but as such adjustable lguiding members are quiteV well'lmown in the art, it will not be necessary to illustrate or describe them in detail in the present application. Supported by theportions 1V of thel side` frame members 1 and located beneath the plate ,221 is a pair of feeding rolls 25 and 26, said feeding rolls :being mounted on transversely extended shafts 25 andf26 which are j ournaled inthe portions 1A of the frame members 1. The envelopeblanks supported by the feed table FV are fedy tothe feeding rolls 25 and 26bya suction tube 27 ofthe type common to paper feeding mechanisms.. lThe suction tube has mechanism associated `therewithq(not shown) whiehoperates to: swing the portion 27ofthe`suctiontube'in an arc ofla circle tothe position indicatedby Vdotted lines lin Fig. 1,r and to' permit such movemei'it the feeding'rolls' are'each arranged in twopartsrwith a space betweenthe inner ends of theopposed sections of each roll. The

spaces between the sections of the rolls 25 and 26 are clearly shown in Fig. 1, wherein saidl spaces are designated by the reference character S. Also, the feeding rolls are of segmental formation, each of the sections of said rolls comprising an arcuate wall as shown in Fig. 1.

Extended transversely of the head C of the machine and journaled for rotation in the angularly extended portions 1 of the side frame members 1 of said head is a shaft 28, and arranged in alined relation with sait. shaft 28 is a similarly supported, transverse shaft 29. 'Ihe shaft 28 has fixed thereto a gumming element 30 of the type ordinarily employed in placing gum on envelope blanks, said element having an arcuate gum-distributing face 30 of such formation as to provide the envelope blanks with layers of gum ofthe proper shape and extent. The transverse shaft 29 Supports a roll 31 which serves as a backing element for the envelope blanks as gum is being applied thereto bythe gumming element 30, the peripheral face of said roll 31 and the arcuate gum-distributing face of the gumming element being movablein substantial contact with each other. 32 designates a gum receptacle,y and 33 designates a roller which is supported so that its lower a., portion rotates in the gum within the gum receptacle 32. The peripheral face lof the roller 33 contacts with the peripheral face I of a gum-transferring roller 34, and this 1 ygum-distributing face 30 of the roller 34 is of such diameter that the arcuate gumming element 30 contacts with the peripheral face of said roller 34 during rotation of said gumming element about the axis of the shaft 28.

In this manner gum from the gum receptacle f is deposited on the arcuate gum-distributing face 30 of the gumming element, the transfer roller 34: transferring gum from the roller 33 to thegum-distributing face referred to.

In order to impart rotary movement to i: the feeding rolls 25 and 26 as well as to thel A rolls 31 and 34 and the gum-distributing element of the gumming mechanism, I mount a gear wheel 35 on the shaft 10 which supports the pulley 11; 4rlhe gear wheel 35 meshes with a smaller gear wheel 36 which is fixedly mounted onthe shaft 29 which supports the backing roller 31. In like manner,

the shaft 28, which supports the gummingV element 30, has fixed thereto a gear wheel 37 which meshes with the gear wheel 36, and

a similar gear wheel 37 is mounted Von the shaft 34 which supports the gum rtransfer roller 34. The feeding rolls 25 and 26 are provided with gear wheels 38 and 39, respectively, which mesh with each other, and rotary motion is transmitted from the gear wheel 36 to the gear wheel 39 by an intermediate gear wheel 40. Rotary motion is imparted to the vgear wheel 35associated with the shaft 10 in a manner to be hereinafter set where said envelope blanks will pass'between i the gumming element 30 and backing roller 3.1, I employ an inclined support 41. Also,

I provide a similar .inclined support ll2 for conducting the envelope blanks from the :position of the gumming element 30 and roller 31 to the point where said blanks are engaged by the pulley and endless belt 21. In the operation of the feeding andigumming mechanism of my improved machine, the envelope kblanks are removed from l:the bottom of th-e stack of blanks `supported by the feed table F by the suction tube 27 ,said blanks vbeing ,drawn through the` opening 23 and being presented to the feeding rolls 25 and 26 so that they pass between said' feeding rolls and are fed forwardly by-'the rarcuate segmental walls thereof. The blanks then pass `from the feeding rolls 25 and `26to the inclined support 41' along which 'said blanks pass to the gumming mechanism. The gum,- minof operation is perform-ed as the' blankspass betweenlthe arcuate gum-distributing vas face 30 of the gumming element .30'a'nd the peripheral faceof the roller 31, and after such gumming operation'ha's been performed the blanks move downwardly along the inclined support 42 to a point where said blanksA are gripped between the pulley 11 and the endless' belt 21. The blanksl which have `been gripped as `described are carried around'the periphery of the pulley 11 in the direction Aindicated by the arrowin Fig. 1,' said blanks being tightly gripped l aty all times `during such movement between "the pulley 11 and mechanism of the machine are carried by the .the endless belt 21. When the blanks-passing i Y 115. of the feeding mechanismiand the gumming f adjustable head C ofthe machine, hence,-by

adjusting said-'head with the aid vof the adjusting screw 4 in the ldirection of the double headed arrow in Fig. 1, the point X at which the blanks pass from between the pulley 11 andthe endless belt 21 may be so vlocated thatv said blanks willbe delivered directly tothe folding mechanism ofthe machine. rIhis -is the predominant feature of the'inventiomand said feature entirely eliminates the interinediate transfer mechanism lformerly employed `for moving the shorter blanks fromthefeed-v ing mechanism to the folding mechanism.-

ias e (iin Alsof, an important feature ofthe invention is V.the provision of'gumming elements 30 which are vadjustable transverselyl of the headC,said gumming elements being secured .to the Vshaft U 28 by means of set screws 28 which permit Vfthe adjustmentreferred to., By providing [for adjustment of the gumrning elements transversely of the'headC, envelope blanks ofdiiferentwidths maybe gummedby the gumming mechanism. i -Y The .envelope machine illustrated in vthe dravvingslforming parts vof this application y 'includes folding mechanism'F which is operf "able'gto fold theblanks in producing completedenvelopes therefrom'.y The particular vfolding mechanism'illustrated is one of a number ofjfolding mechanisms which are in .use at thefpresent' time, and as'the construcftion and `operation of the lfolding mechanism illustrated andthe other folding mechanisms referredto are y'very Well knovvn by persons Y' familiarvvith the art, it Will not be necessary to'descr'ibe the folding mechanism illustrat-k 1 ed in thedravvings in detail.r Itvvill be neces sary,Y however, to VVdescribe the illustrated `'folding' mechanism suflicientlyV to enable `one -tozunderstand the relation of the feeding and gumming mechanisms of the'machine With .respect thereto, and the descriptionof the l'folding mechan'isn'iV of the "machinewill be j only of such scope asv to accomplish thisV purlQThe folding mechanism F ofthe machine 'A comprises a pair', of oppositely Vdisposed plates() which Vserve. tofold'the side flaps-.9V

of theenvelope Vblank E (Fig. 5)..' These plates areadjustably. fixed to carrier ele- .ments 5l Which are pivotally attached at 5'1to bell-crank levers 52.V `Each of the bellcrank yl'evers V52 has rotatably associated ,therewith at its forward portion a'roller 53 VWhich/contacts with the top face of a yfined -.cam54,'saidtop face' of each'ofgsaid'fixe'd camscomprising aloyver facev portion 549, an upper` faceportion lgand an "in'clin'edjfacel l` portion ifzwhich joins the faceportions 54@ and 5411,- as shoWnin Fig. 7. vAssociated with" f each.Y ofthe Abellecrank levers 52 is -a member 55 Whichis guided for vertical movementgby {3150.guidingelementsv 56, said member 55 being pivoted atff-its .upper` end to the associated bellfcrank lever 52,` and being provided at Y itslowerend `with avroller 57 Which contacts V.Witha cam 58 mounted on'a shaftv59. AThe bell-crank levers 52 are provided Withco'il j springs 50 Vwhich tend Vto draw thesnbstan- Vtiallyhorizontal portions of said bell-crank 1 leversdownvvardly- Also, coil springs 6l are [attached to the carriers 51- and to liked parts off the .machine in fa manner Vto cause Athe rollers associated With said carriers yto bejdrawn downwardly ,against the` top faces ".fvThe foldingy mechanism lfincludes also a gplate 62@ (ligs. '2 and 7)v Which v*acts as a 'to one of f ragazze support for :the blanks during the'folding operations, said vplatebeing supported ina fixed position-by thefizied element 6 3 of ther machine. `Arranged above the plate 62 Vis a folding plate 64? said folding plate being fixedly maintained in..y slightly spacedrelation with respect to the plate G2, as shown Yin the tvvo views of thedrawings referred to.

Fixedto a rockable shaft 65V (Fig. 2)'lis Y Y a pair of substantially lvertically disposed arms 65, the upper endsof Which are movable as suggested by; the arrow in Fig. 2 When the rockable shaftgis rocked. Pivoted to vthe arms at the' locations ofthe trunnions G7 Which entend Ainto openings formed in.

the arms 66 is a transversely eXtencl-edbar (Seto which is rigidly'attached a lforwardly Vextended folding plate 69.The folding plate is proferablyv curved downwardly and is movable vwith the arms 66 Whenfthe npperportions thereof movein the direcd bv the a W in Fig.' 2.V Fixed niions 6'? is an arm 70, Vwhich -i a roller-25 said roller beis provided v.

ing arranged in rollingcontactyvith the top y face or an "73 whichV is pivoted" at Tl Y D i O 2l; lling/Li eral faces thereof are in substantial contact with each other, so that the envelopesyvill e fed throu lh the machine b Vrsaid feedingV 1 Q. l. j Y :a rollers and ieeding element. Also,'theseele part of the machine.' .The armV 1051 ments serve to canse certain ofthe flapslof 1 the envelopes toriadliere'to each other because i of gumV applied thereto. y

in the-operation oftne, folding mechanism 'Fv of the 'in acliine',k the plates 50 arlefmoved inwardly the cams 58,'a'nd simultaneous with such inward movement the inner Vends cf'said plates'are' moved'fupwardlyldue to Vtlm;rollers 53k (Fig. 7) rollingvr onthe irreg- 'xular top-.faces of thenxed cams' 54.: rihis movement of the plates-50 causes the side naps' Softheenvelope blank E to be folded upwardly and inwardly [over theV folding plate G4 in tlie Well'knoivn manner. vimmediately-v following such foldingoff-the side flaps s oftheenvelope blankV E the cam 76 .ele-vates' ythe outer end portion. ofthe arm that Alike upward move-` 73.,` with the. result ment Willbe impl tedto the arm' @through the instrumentality of the Vroller 75. The armO, is fixed toonev ofthe trunnions 67,

and T4when said arm 'is elevated as described,Y e the bar V68' Willbe pivoted4 about the trunfnjions, -Wherebylthefouter end portion of lthe folding plate 69Will`be moved upwardly `in an arc of a circle. This` movementof the folding plate 69 will result in the flap e of the envelope blank E being subjected to like upward movement.` During the upward movement ofthe outer end portion of the folding plate 69 the upper end portions of the ainis 66 will. be moved .in the direction indicated vby the arrow inl?1 ig. 2in response to Vrocking movement imparted tothe shaft by suitable mechanism (not shown), `and by virtue of4 the upward and longitudinal movement of said folding plate the flap e, of the envelope blank E is folded upwardlyy and over the fixed folding plate 64.

During passage thereof through the inachine the movement of each envelope blank is arrested to permit the folding operation to take place,.and for-arresting .the movement of the blanks I einployfa pair of stop upper portions of the stop elements portions thereof are arranged substantially parallely and in overlapping relation, as shown in Fig. 7 and another portion 45v of each stop element extends downwardly from the horizontal portion thereof. Attached to the oppositely disposed stop elements' 45 above the' pivotal points 47 thereof is a coilspring 48 which tends to move the lower end portions of said stop element in a direction away from each other. 49 designates adjustable stops which serve to limit the amount of movement of the stop elements 45. i

Supported by suitable bearings 8l is a transversely extended shaft 82 to which an arm 83 is fixed, said larm 88 being arranged beneath the overlapping portions of the stop elements 45, as shown in Figs. 2 and 7. The transverse shaft 82 has fixed to it a springloaded arm 84 which is provided at the end opposite tothe end thereof which is attached to the shaft 82 with a roller 85. lThe roller 85 contacts with the peripheral face of a cam 86A which is fixed on the drive shaft 87 ofthe machin-e, said cam-being so shaped as to cause the roller 85 and the end portion of.

the arm 84 at which said. roller is located to move upwardly in an arc of a. circle.y

In the operation of the stop elements 45 the high portion ofthe cam causes the roller 85 and outer end portion of the arm 84 to be elevated, withuthe result that the outer end portion of the arm 83 is moved downwardly. This will permit the coil spring 48 to draw the portions of thestop elements 45 above the pivotal points .47 thereof inwardly, so as toA cause the lower portions of said stopl elements to move away from each other, the inner end portions of the horizontal portions of the stop elements moving` downwardly during such movement of said stop elements..` When the lower portions oftheV Y stop elements 45-are separated v as described, the envelope blanksmay vpass `between said. lower portions of said stop, elements Vand continue their passage vthroughthe machine.

However, when the low 'portion 86 of Athe cam 86 is in Contact with the roller 85, said? roller and the outer end portion-ofthe y arm- 84 will v be depressed,lwith the result thatv the outer end portion of the arm'83 will be elevated. arm 83 will cause the inner end -portionsof the horizontal portions ofthe stop elements to be elevated,vwith. the result that the lower end portions of the verticalfportions .45. of

whereby; said lower end portions of the stop elements will be in Athepath oftra'vel of the envelope blanks so as to 4interrupt the *movementthereofi-p` f It is plain, therefore, that during the opso' thefstop elements 145 will `be drawn inwardly, *l*

eration of the machine the lower portionsof Y.

the stop elements 45 periodically `moveinwardly toward each otherto stop an envelope blankwhich is approaching said stop elements, and that during such interruption of the movement of the envelope blank said i blank is folded, as already explained.; After each envelope blank has been folded, it

again resumes its movementthrough'thema-j chineby virtue of they operationof a rotary segmental feeding element` 7 which engages the blank rbetween the ,cur-ved feeding facer thereofv and the'plate 62 in a manner tofeed said blank between the roller 78 andthe segmer'ital feeding element 80, whereby the movement of said blank throngh the machine is continued, said blank being guided during ysuch movement bywan element*` 8 7 which is so arranged as to feed the blank between feeding rollers' 88 and 89 which are mounted on the drive shaft 87 and a shaft 90, respectively.

The Vdriveshaft 87' has mounted thereon a gear wheel 91. whichmeshes with anl inten' mediate gear Awheel 92.L Theintermed-iate gear wheel'92 in turn meshes with a gear wheel 98, which is fixedto the shaft 77 on which the feeding roller7 8 is mounted, and the gear wheel 98 meshes with a similar gear wheely fixed to the shaft 79 onwhich'the segmental feeding element 80 is a rranged. In this mann'enmotionistransmitted from the drive shaft87 to the feeding means pro'- vided by the roller78 and segmental feedllO ing element 80; Also, the segmental `feed- 15. V-1 Such elevatedlpositiongof the 65 l anism toward and from saidy stop -means to "pull/ey' l1 `of Vv the feeding mechanismis horizontally supported shaft 99.` rlheihori-Vt zfontal shaft -99 serves 'tof-tran'smit-v 'motion to the'feedingfmechanism `of the machine, said 1 shaft',havingVIV a-*bevel gear 100' *associatedithe'revvith which-meshes with a similar bevel? gear 100 fixed vto theshaft 1 0 on Which *the mounted.The bevel gear 110() is feathered ytothe shaft f99 sothat itmaymove longitugear-to move With..saifd'head-' G.

- fom-l.dinally'WithV respect thereto When the head C' adjusted,,said bevel gear 100 being enga'gedby an element 101 '-(Fig. l) on lthe head C, which permits the''bevel gear to rotate With then-shaft 99 but-causes said bevel lFrom the foregoing specification it isgplain that the preferred form ofthe improved enve'lope-makingy machine disclosed herein-includes .a Vfolding ymechanism of Vany desired foi-mand a suitable feeding mechanism, said feeding mechanism being adjustabletovvardj and from the 'folding 'mechanism-.so that en- V`velope blanks of various depths Vmay be op- L ment be obtained I 'by maintaining lthe feedingv mechanism of the .machine lin a fixed location erated oniby themachine With'convenience i and facility. While the above describes the preferred form of my invention, I do not wish to bev limited'to this precise arrangeas substantially the same'y results may andadjusting the folding mechanismftoward and from said feeding mechanisnLV In g its broadest laspect, therefore, myv invention in-v volves providing an r envelop'e-making ma- 'I chine'f'vvhich includes "affeedin'g unit and a folding untale 0f Which isl adjustablefto- Ward andv from theother to permit of envelope blanks of different depths being acted onbyfthe machine. f V40 Y i* "[1- 'Iy envelope-making machinecompris- I claim i ing lblai'ikfee'ding mechanism', blank-foldmechanism, stop means'for arresting 'movef yment of the en'velope; blanks y to the blanking mechanism, stop Vmeans forarresting movement of the envelope blanks to `vthe blank-folding mechanism,V and means for providing for the adjustment of-4 one of said mechanisms'tovvardand from said stop means to permit the vn ia'chine'to produce envelopes from blanks'of different depths. envelope-making machinecompri'sing blank-folding mechanism, blank-feeding folding "mechanism, and means Vproviding for the adjustment of saidblank-feeding mechanismftoward and from'said stopl means to permit the rmachine to produce envelopes from blanks of different depths.

3. Anenvelope-making machine comprising blank-folding mechanism, blankfeeding mechanism, stofpme'ans for arresting movement of the' envelope blanks to the blankfolding mechanism and means providing for the adj ustment of said blank-feedingy mechpermit-the inachinefftov produce-i envelopesL 'rom blanksy o fdifferent depths, said means:

comprising a movable elementv providing/a j support for the (feeding mechanism, Y and.V vmeans for subjecting said movable element to adjustment.

- 45p-An envelope-making machinecomprising-blank-foldingmechanism, blank-feeding me'chanism,"stop means for arrestingfmovement of the envelope vblanks tothe blankf-olding mechanism and means providing for thev adjustment of said blank-feeding mechc anism toward and. from said'stop means topermit the machine to produce envelopes from blanks of different depths, said means comprising a movable element providing .az

support for *the feeding mechanism, Vand screW-threaded` means fory subjecting saidk movable element lto adjustment; l j 5. An envelope-making machine comprising blank-foldingmechanism, blank-feeding mechanism, stop meanslfor arresting movement ofthe envelope blanks Vto the blank-folding mechanism and means providingffor the adj ustmentof said blank-'feeding mechanism toward `and from said stop means'to permit the machine` to produce envelopes from blanks of different'depths, said vmeans comprising a movable element providing a sup.-VL

port forthe" feeding mechanism,- guiding means' lfor guiding the movement' of -said Sei movable element, 'and screw-threaded means for subjecting justment.V f

6. An-envelope-making machine comprising blank-folding mechanism, blank-feeding mechanism, means providing for the adjustment of said blank-feeding lmechani'sm to- Ward'and from said blank-folding mechanism to permit the machine vto produce envelopes from v blanks of different depths, said means comprising a movableelement proand means for subjecting said'movable element to adjustment,v andgumming mechamovable'with said. i

nism supported by and movable element. l I I 7 An envelope-makin'g`-'machine lcomprising blank-folding mechanism7 blank-feeding mechanism, means providing for the adjust- I said movablefelement to ad-` l viding asupport for the feeding mechanism CTI ing mechanism, means providing for the adjustment of said blank-feeding mechanism toward and from said blank-folding mechanism to permit the machine to produce envelopes from blanks of different depths, said means comprising a movable element providing a support for thefeeding mechanism and means for subjecting said movable element to adjustment, gumming mechanism supported by and movable With said movable elements, and a feed table for feeding envelope lanks to the feeding mechanism.

9. An envelope-making machine comprising blank-folding mechanism, blank-feeding mechanism, means providing for the adjustment of said blank-feeding mechanism to- Ward and from said blank-folding mechanism to permit the machine to produce envelopes from blanks of different depths, said means comprising a movable element providing a support for the feeding mechanism and means for subjecting said movable element to adjustment, gumming mechanism supported by and movable With said movable elem-ents,

and an adjustable feed table for feeding envelope blanks to the feeding mechanism.

10. An envelope-making machine comprising blank-folding mechanism, blank-feeding mechanism, means providing for the adjustment of said blank-feeding mechanism to- Ward and from said blank-folding mechanism to permit the machine to produce envelopes from blanks of different depths, said means comprising a movable element providing a support for the feeding mechanism and means for subjecting said movable element to adjustment, gumming mechanism supported by and movable With said movable element, and a feed table carried by said movable element for feeding envelope blanks to 'the feeding mechanism.

ll. An envelope-making machine comprising blank-folding mechanism, blank-feeding mechanism, means providing for the adjustment of said blank-feeding mechanism tovvard and from said blank-folding mechanism to permit the machine to produce envelopes from blanks of dierent depths, said means comprising a movable element providing a support for he feeding mechanism and means for subjecting said movable element to adjustment, gumming mechanism supported by and movable with said movable element, and an adjustable feed table carried by said movable element for feeding envelope blanks to the feeding mechanism.

12. An envelope-making machine comprising blank-folding mechanism, blank-feeding mechanism, said blank-feeding mechanism including an endless feeding belt supported for operation on pulleys, stop means for arresting movement of the envelope blanks to the blank-folding mechanism, and means providing for the adjustment of said blankfeeding mechanism toward and from said stop means to permit the machine to produce envelopes from blanks of Vdifferent depths. Y

13. An envelope-making machine comprising blank-folding mechanism, blank-feeding mechanism, said blank-feeding mechanism including an endless feeding belt supported for operation on pulleys, one of said pulleysl being relatively large with respect fto the other belt-supporting pulleys and the envelope blanks being fed by the feeding mechanism being moved between the circumi ferential face of said large pulley and said endless belt, and means providing for the adjustment of said blank-feeding mechanism toward and from said blank-folding mechanism to permit the machine to produce envelopes from blanks of different depths.

l-l. An envelope-making machine comprising blank-folding mechanism, blank-feeding mechanism, stop means for arresting movement of the envelope blanks to the blankfolding mechanism, means providing for the adjustment of said blank-feeding mechanism toward and from said stop means to permit lthe machine to produce envelopes from blanks of different depths, and driving means for driving said feeding mechanism, said feeding mechanism being adjustable relative to said driving means.

15. An envelope-making machine comprising blank-folding mechanism, blank-feeding mechanism, stop means for arresting movement of the envelope blanks to the blankfolding mechanism, means providing for the adjustment of said blank-feeding mechanism toward and from said means to permit the machine to produce envelopes from blanks of different depths, and driving means for driving said feeding mechanism, said driving means including a shaft with respect to Which said feeding mechanism is adjustable.

In testimony that I claim the foregoing I hereunto affix my signature.

CHARLES F. PFLANZE. 

